First published as part of AS K173.1-1971, AS K173.2-1971 and AS K173.3-1971.AS K173.1-1971, AS K173.2-1971 and AS K173.3-1971 revised, amalgamated and redesignated in part as AS 2331.3.8-1982.Second edition 2001.Reconfirmed 2017. Originated as part of AS K173.1-1971, AS K173.2-1971 and AS K173.1-1971. Previous edition AS 2331.3.8-1982. Second edition 2001.